diff --git a/Jenkinsfile b/Jenkinsfile
index 6b55368..688bca2 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -357,7 +357,7 @@ def deployReleaseJobs(def serviceList, String smartgears){
                 if (smartgears)
                 	deployRelease(service[0], service[ 1 ], smartgears);
                 else
-                	deployRelease(service[0], service[ 1 ], null);
+                	deployRelease(service[0], service[ 1 ], '');
             }
         }
    }